US2266393A - Paper drill - Google Patents

Description

Dec. 16, 1941. H. J. HoFFMAN PAPER DRILL Filed Oct. 14, 1.940

VVENTOR I HAROLD [HOFFMAN ATTazNEr/J' Patented Dec. 16, 1941 UNITED STATES PATENT CFFICE y I 2,266,393 i Y, f

Y PAPER DRILL Harold JQ Horinan, Hastings, Minn., assigner to The Smead Manufacturing Company, Inc., Hastings, Minn., a corporationof lvliml'esotal Application October 14, 1940, Serial No'.- 361,041

2 Claims. (Cl. 1164-124) This invention relates to new and useful `improvements in paper drills, and more vparticularly to a hand operateddrill adapted for'use in drilling holes through paper and various other articles. An object of the present invention isV` to provide a simple and inexpensive tool of the class described, which is neat and attractive in appearance, and which is so shaped and proportioned that it may be conveniently manipulated to force the bi1; thereofr through the several sheets or thicknesses of paper with very little effort.

A further object is to provide a paper drill comprising a handle having a chamber therein and provided at one-end with a suitable hollow bit adapted to engage the work, and whereby the drilled portions of paper may pass upwardly through the bit and into said chamber, and said bit being reversibly supported in the handle, whereby when the tool is not in use, the cutting edge of the bit may be positioned within said Chamber to prevent damage thereto.

Other objects of the invention will appear from the following description and accompanying drawingand Will be pointed out-in Athe annexed claims.

In the accompanying drawing, there has been disclosed a structure designed to carry out the various objects of the invention, but it is to be understood that the invention is not confined to the exact features shown as Various changes may be made within thel scope of thel claims which follow.

In the drawing:

Figure 1 is a View showing substantially the position of the tool when in use;

Figure 2 is a View on a slightly larger scale, Y

venting relative rotation of the bit in its supporting socket.

Ihe novel tool herein disclosed is shown comprising a handle, generally designated by the numeral 2, having an enlarged portion or head 3 at its upper end adapted to be engaged by the palm of the hand, when the tool is in use, The entire handle is preferably made hollow, `as

shown inV Figures 2 and 3, for receiving' the paper waas' or disksremoved by' the drill, and whereby a maximum number of" such wads or disks may be received therein-before it becomes necessary to empty the handle of its contents.

The handlem'ay be made from any" suitable material applicable for the purpose. `Plastics, for example, have' been found to provide a very desirable material.V The handle is` preferably more or less transparent so that the drilledV portions of paper received in the chamber 4 may readily be seen.

A suitable bushing 5 is secured to the lower end of the tool handle, as shown in Figures 2 and 3. This bushing is lix-ed to the handle and is not intended tov be removed therefrom in ordinary use. The bushing is shown provided with a threaded extension 6 adapted to receive a suitable clamping nut 1, which preferably is knurled as shown at 8 in Figure 1, to facilitate rotating the nut.

The bushing 5 has a socket 9 which preferably is Vhexagonal in cross section, or otherwise shaped to prevent relative rotation of the shank I0 of the bit, generally designated by the numeral Il. The shank I0 of the bit, as clearly illustrated in Figures 4 and 5, is shaped to conform to the shape of the socket 9, so that when fitted therein, it cannot rrelatively rotate in the bushing, as willY be readily understood by reference to Figure 5. The socket 9 terminates at its inner end in a shoulder I2, against which the endy portion I3 ofthe bit is seated, when the tool is in operative position in the handle, 'as shown in Figure 2. It will be noted by reference to Figure 4,that the bit is also provided with an annular shoulder I4 adapted to engage the shoulder I2 when the tool is reversed in the handle, as shown in Figure 3.

The bushing is provided at its inner end with a passage I5, which establishes communication between the chamber 4 and socket 9 and is sufciently large to permit the reduced end portion I6 ofthe bit to pass therethrough, when the bit is in the position shown in Figure 3. rIfhe inner end of the bushing 5 is preferably beveled olf, `as indicated `at I'I, to facilitate removing the punohings from the chamber 4, when the bit isdetached from the handle.

The novel tool herein disclosed has been found veryl practical and useful in operation. TheV cutting edge I8 of the bit is so designed that the terminal of the bit may readily be forced through the work I9, as shown in Figure l, with very little effort. The tool is operated by simply applying the bit against the surface of the paper or other work, and then applying pressure to the head 3 of the handle and at the same time, slightly rotating the tool back and forth whereby the cutting edge may readily be forced through the work. The punchings removed from the paper or work pass upwardly through the bore 20 of the bit into the chamber 4. If desired, the bore 20 in the bit may be slightly tapered whereby it gradually enlarges in diameter in an upward direction, when viewed as shown in Figure 2, thereby to permit the paper wads or disks to pass freely upwardly therethrough and into the chamber 4.

The chamber 4 is comparatively large so that the tool may be used for a comparatively long time before the chamber is sufficiently filled with punchings to require emptying. When the chamber is to be emptied, the bit is removed from the socket 9 by unscrewng the clamping nut 1, after which the drilled pieces may readily be removed from the chamber through the passage I5 in thebushing which, it will be noted, is considerably larger in diameter than the bore of the bit Il.

I claim as my invention:

1. A tool of the class described comprising a handle formed of plastic material and having an enlarged head at one end adapted to be engaged by the palm of the hand, when the tool is in use, said handle having a chamber therein, a bushing pressed into one end of the handle and having a bore communicating with said chamber, said bore having a counterbore at one end, a bit having a head reversibly received in said counterbore, whereby the cutting edge of the bit may be positioned within said chamber, when the tool is not in use, and a clamping nut for securing the bit in position in the socket.

2. A tool of the class described comprising a follow handle having a hand-engaging portion at one end, a bushing xedly secured in the 0pposite end of the handle and having an annular shoulder seated against the end of the handle, said bushing having a bore, the inner end of which communicates with the interior of the handle, saidV bore having an enlarged socket at its outer end, a bit having a shank provided at one end with an enlarged head adapted to be non-rotatably and reversibly received in said socket, the reversibility of the bit permitting the cutting edge thereof to be positioned within said chamber, when the tool is not in use, and a clamping nut received in threaded engagement with the bushing and having a shoulder for engaging the head of the bit, thereby to secure the bit in position in the socket.

HAROLD J. HOFFMAN.

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